/*
 *  LibNoPoll: A websocket library
 *  Copyright (C) 2017 Advanced Software Production Line, S.L.
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public License
 *  as published by the Free Software Foundation; either version 2.1
 *  of the License, or (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this program; if not, write to the Free
 *  Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 *  02111-1307 USA
 *
 *  You may find a copy of the license under this software is released
 *  at COPYING file. This is LGPL software: you are welcome to develop
 *  proprietary applications using this library without any royalty or
 *  fee but returning back any change, improvement or addition in the
 *  form of source code, project image, documentation patches, etc.
 *
 *  For commercial support on build Websocket enabled solutions
 *  contact us:
 *
 *      Postal address:
 *         Advanced Software Production Line, S.L.
 *         Av. Juan Carlos I, Nº13, 2ºC
 *         Alcalá de Henares 28806 Madrid
 *         Spain
 *
 *      Email address:
 *         info@aspl.es - http://www.aspl.es/nopoll
 */
#include "nopoll.h"
#include "nopoll_private.h"

/**
 * \defgroup nopoll_log noPoll Log: Console log reporting for noPoll library
 */

/**
 * \addtogroup nopoll_log
 * @{
 */

/**
 * @brief Allows to check if the log reporting inside the system is
 * enabled.
 *
 * @return nopoll_true if the log is enabled or nopoll_false
 */
nopoll_bool nopoll_log_is_enabled(noPollCtx *ctx) {
    if (ctx == NULL)
        return nopoll_false;

    /* return current value */
    return ctx->debug_enabled;
}

/**
 *
 * @brief Allows to get current log configuration, to use colors.
 *
 * @return nopoll_true if the color log is enabled or nopoll_false
 */
nopoll_bool nopoll_log_color_is_enabled(noPollCtx *ctx) {

    if (ctx == NULL)
        return nopoll_false;

    /* return current value */
    return ctx->debug_color_enabled;
}

/**
 * @brief Allows to control how to activate the log reporting to the
 * console from the nopoll core library.
 *
 * @param ctx The context where the operation will take place.
 *
 * @param value nopoll_true to enable log to console, otherwise nopoll_false is
 * returned.
 */
void nopoll_log_enable(noPollCtx *ctx, nopoll_bool value) {
    if (ctx == NULL)
        return;

    /* activate debuging according to the variable */
    ctx->debug_enabled = value;
    return;
}

/**
 * @brief Allows to control how to activate the colog log reporting to
 * the console from the nopoll core library.
 *
 * @param ctx The context where the operation will take place.
 *
 * @param value nopoll_true to enable log to console, otherwise nopoll_false is
 * returned.
 */
void nopoll_log_color_enable(noPollCtx *ctx, nopoll_bool value) {
    if (ctx == NULL)
        return;

    /* activate color debuging according to the variable */
    ctx->debug_color_enabled = value;
    return;
}

/**
 * @brief Allows to define a log handler that will receive all logs
 * produced under the provided content.
 *
 * @param ctx The context that is going to be configured.
 *
 * @param handler The handler to be called for each log to be
 * notified. Passing in NULL is allowed to remove any previously
 * configured handler.
 *
 * @param user_data User defined pointer to be passed in into the
 * handler configured along with the log notified.
 */
void nopoll_log_set_handler(noPollCtx *ctx, noPollLogHandler handler, noPollPtr user_data) {
    nopoll_return_if_fail (ctx, ctx);

    ctx->log_handler = handler;
    ctx->log_user_data = user_data;

    return;
}

/**
 * @internal Allows to drop a log to the console.
 *
 * This function allow to drop a log to the console using the given
 * domain, as an identification of which subsystem have reported the
 * information, and report level. This report level is used to notify
 * the consideration of the log reported.
 *
 * The function allows to provide a printf like interface to report
 * messages. Here are some examples:
 *
 * \code
 * // drop a log about current library initialization
 * nopoll_log (ctx, NOPOLL_LEVEL_DEBUG, "library properly initialized status=%d", status);
 * \endcode
 *
 *
 * @param ctx The context where the operation will take place.
 *
 * @param level The level that this message is classificed.
 *
 * @param message The message to report. The message to report must be
 * not NULL.
 */
void __nopoll_log(noPollCtx *ctx, const char *function_name, const char *file, int line, noPollDebugLevel level,
                  const char *message, ...) {

#ifdef SHOW_DEBUG_LOG
    va_list      args;
    char       * log_msg;
    char       * log_msg2;

    if (ctx && ctx->log_handler) {
        /* print the message */
        va_start (args, message);
        log_msg = nopoll_strdup_printfv (message, args);
        va_end (args);

        log_msg2 = log_msg;
        log_msg = nopoll_strdup_printf ("%s:%d %s ", file, line, log_msg);
        nopoll_free (log_msg2);

        ctx->log_handler (ctx, level, log_msg, ctx->log_user_data);
        nopoll_free (log_msg);
        return;
    }

    /* check if the log is enabled */
    if (! nopoll_log_is_enabled (ctx))
        return;

    /* printout the process pid */
    if (nopoll_log_color_is_enabled (ctx))
        printf ("\e[1;36m(proc %d)\e[0m: ", getpid ());
    else
        printf ("(proc %d): ", getpid ());

    /* drop a log according to the level */
    if (nopoll_log_color_is_enabled (ctx)) {
        switch (level) {
        case NOPOLL_LEVEL_DEBUG:
            printf ("(\e[1;32mdebug\e[0m) ");
            break;
        case NOPOLL_LEVEL_WARNING:
            printf ("(\e[1;33mwarning\e[0m) ");
            break;
        case NOPOLL_LEVEL_CRITICAL:
            printf ("(\e[1;31mcritical\e[0m) ");
            break;
        }
    } else {
        switch (level) {
        case NOPOLL_LEVEL_DEBUG:
            printf ("(debug)");
            break;
        case NOPOLL_LEVEL_WARNING:
            printf ("(warning)");
            break;
        case NOPOLL_LEVEL_CRITICAL:
            printf ("(critical) ");
            break;
        }
    }

    /* drop a log according to the domain */
    printf ("%s:%d ", file, line);

    /* print the message */
    va_start (args, message);
    vprintf (message, args);
    va_end (args);

    printf ("\n");

    /* ensure that the log is droped to the console */
    fflush (stdout);
#endif

    /* return */
    return;
}

/* @} */
